Ventilator.



' No. 676.260. P te t d 1' l90l. w. -B. JOHNSON. a m I VENTILATDR.

(Applicatian filed Augv 8, L900) (No Model.)

n: "cums PETERS c0. morom'ua. WASMINOYON. a. c.

PATENT FEICE.

"WILLIAM BURGELAND JOHNSON, OF LIVERPOOL, ENGLAND.

VENTlLATOR.

SPECIFICATION forming part of Letters Patent No. 676,260, dated June 11,1901. Application filed August 8, 1900. Serial No. 26,250. (No model.)

To all whom it may concern.-

Be it known that I, WILLIAM BURGELAND JOHNSON, a subject of the Queen ofGreat Britain, residing at Liverpool, in the county of Lancaster,England, have invented new and usefullmprovementsin Ventilators, ofwhich the following is a specification.

The object of the invention is to provide a ventilator by which whenopen or partly open air entering a room may be deflected in any desireddirection and which when closed will present a flush or level surface tothe interior of the room without ledges or recesses whereon dust maycollect. I attain this object by appliances such as are illustrated inthe accompanying drawings, in which Figure 1 is a longitudinal sectionof a ventilator constructed according to my invention. Fig. 2 is alongitudinal section of a modification of ventilator under my invention.Fig. 3 is a back View of Fig. 2. Fig. 4c is a longitudinal section ofanother modification.

Like letters indicate similar parts in all the views.

Referring to Fig. 1, a b 0 cl are vanes or plates fitted within an airpassage or opening .e through the wall fof the room or space to beventilated. g represents pivots on which the vanes a. Z) 0 can be turnedin order that such vanes can be disposed either at any uniform angle orat various angles, as desired, so that air entering in the direction ofthe arrows may be deflected .either fanwise to diffuse it widely or instraight lines to direct it to a particular place, as desired. Thepivots g are preferably fitted into pieces 72, placed at each side ofand movable into or out of a box 2', so that such side pieces and thevanes may be easily removed for cleaning. The side pieces h areconnected together by a piece The box t' is .fitted into the opening ein the wall. The pivots g are preferably fitted so tight that the vaneswill remain at any angle at which they may be placed, or instead oftightly-fitting pivots any convenient catch or frictional device may beused to retain the vanes at the desired angles. The vane d is providedat the sides with arms 7r, pivoted to the sides It at Z. The position ofthe pivot Z is so arranged relatively to the plane of the vane (1 thatwhen it is desired to completely close the ventilator the vane d can bemoved into the position shown by dotted lines at flush or level with theouter face of the box 7 The lower edge on of the vane d rests whenclosed against a vertical stop or closing piece or plate n, secured tothe sides It and flush with the outer face of the box t'. The vane (1may be retained in any desired position between closed and full open bymeans of any usual frictional device or catch. The vanes b and c are cutaway at the sides, so that in whatever position they may be placed freemotion of the arm in will be allowed for opening or closing theventilator by the vane 01. By placing the vanes a b 0 cl in the positionshown by solid lines the air is difiused fanwise and by placing them asshown by dotted lines a b o d the air is directed downward in straightlines.

Referring to Figs. .t and 3, in this modification the vanes b and c arepivoted 'o'n brackets 0, secured to the sides 7L and projecting so muchas to allow of f ree motion of the arms 76 underneath such brackets. Theother parts of the ventilator and the action are the same as in Fig. 1.

Referring to Fig. 4, in this modification the vanes a b are fixed to thesides 71, and the vane c is not fixed at the ends, but is supported bybrackets 0 from the vane 19, by which brackets the ends of the vane care --held at such distance from the sides 7?. as to allow motion of thearms 70, connected to the vane (l. The flush front of the vane d allowsof ornamen= tation, so as to present a pleasing appearance when theventilator is closed.

What I claim, and desire to secure by Letters Patent is 1. In aventilator, the combination with an air-passage, of several vanessecured to the sides of the passage at one end thereof, the lowest oneof said vanes being made fiat and provided with arms pivoted at theirextremities to the sides of the air-passage, the other vanes beingsupported clear of the said arms,

and a vertical stop-plate for the lower edge of the armed vane, saidstopplate and armed vane being arranged to be substantially flush withthe edge of the air-passage when closed; substantially as described.

2. In a ventilator the combination with an air-passage of severalindependently-pivoted vanes at one end thereof, one of the vanes Intestimony whereof I have signed my being connected to its pivots byarms, at least name to this specification in the presence of one of theother vanes being mounted on two subscribing Witnesses.

brackets arranged to allow free motion of WILLIAM BURGELAND JOHNSON. thesaid arms, and a vertical stop-plate for \Vitnesses: the lower edge ofthe armed Vane, substan- E. OWEN,

tially as described. W. OWEN.

